[gnome-software] Make screenshot selection work again

[Kalev Lember <klember src gnome org>]

commit 6638eaf50d8485b55add7fbcf6fe0ccaf40b9391
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Aug 31 11:09:34 2014 -0400

    Make screenshot selection work again
    
    This is a workaround for some yet-to-be-diagnosed GTK+
    gesture fallout. The stack we use for each screenshot has
    a window. Setting the event mask explicitly ensures that we
    get button events, which will then bubble up the listbox
    which maintains the selection.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=735712

 src/gs-screenshot-image.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/src/gs-screenshot-image.c b/src/gs-screenshot-image.c
index 55b94f3..06629fd 100644
--- a/src/gs-screenshot-image.c
+++ b/src/gs-screenshot-image.c
@@ -454,6 +454,11 @@ gs_screenshot_image_init (GsScreenshotImage *ssimg)
 
        gtk_widget_set_has_window (GTK_WIDGET (ssimg), FALSE);
        gtk_widget_init_template (GTK_WIDGET (ssimg));
+       gtk_widget_add_events (ssimg->priv->stack, GDK_BUTTON_PRESS_MASK |
+                                                  GDK_BUTTON_RELEASE_MASK |
+                                                  GDK_TOUCH_MASK |
+                                                  GDK_ENTER_NOTIFY_MASK |
+                                                  GDK_LEAVE_NOTIFY_MASK);
 
        accessible = gtk_widget_get_accessible (GTK_WIDGET (ssimg));
        if (accessible != 0) {